(1. 北京科技大學(xué) 金屬礦山高效開(kāi)采與安全教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083;
2. 武漢鋼鐵集團(tuán)礦業(yè)有限責(zé)任公司，武漢430080;
3. 河南理工大學(xué) 材料科學(xué)與工程學(xué)院，焦作 454003)
摘 要: 討論還原劑對(duì)鄂西高磷鮞狀赤鐵礦直接還原同步脫磷的影響，研究在固定脫磷劑用量下，還原劑用量對(duì)還原鐵中鐵、磷含量及鐵回收率的影響，并研究其焙燒產(chǎn)物。結(jié)果表明：還原劑中固定碳及揮發(fā)分對(duì)還原鐵中鐵品位及鐵回收率的影響較大，灰分對(duì)還原鐵中磷品位的影響較大；當(dāng)使用同一還原劑時(shí)，焙燒產(chǎn)物中金屬鐵含量隨還原劑用量的增加而增加，浮氏體含量隨還原劑用量的增加而降低，還原劑用量的增加會(huì)減弱脫磷劑與礦石中主要脈石礦物生成鋁硅酸鈉的趨勢(shì)；當(dāng)還原劑用量相同時(shí)，活性炭、焦炭、無(wú)煙煤和褐煤所得焙燒產(chǎn)物中金屬鐵含量逐漸增加，浮氏體含量逐漸降低；在這4種還原劑中，褐煤直接還原同步脫磷的效果最好，無(wú)煙煤和焦炭次之，活性炭的效果最差。
關(guān)鍵字: 高磷鮞狀赤鐵礦；直接還原；同步脫磷；還原劑；固定碳；揮發(fā)分
YANG Da-wei1, LI Zhi-xiang2, XING Bao-lin
（1. Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China;
2. Wuhan Iron & Steel Group Minerals Co., Ltd., Wuhan 430080, China;
3. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China）
Abstract:With a high-phosphorus oolitic hematite ore as the sample, the effects of reductants on direct reduction and synchronous dephosphorization were investigated, the effects of different solid reductant dosages on the contents of Fe and P as well as iron recovery in direct reduced iron (DRI) at a fixed dephosphorization agent dosage were studied, and the roasted products were also discussed. The results show that the fixed carbon and volatile in the reductants have a great influence on Fe grade and recovery of direct iron, and the ash has a great effect on P grade of the direct iron. The contents of Fe and wustite in the roasted products increase and decrease respectively by increasing the dosage of reductants, the trend of sodium aluminosilicate generated from the reaction of dephosphorization agent and the gangue minerals can be reduced by increasing the dosage of reductants. Under the same dosage of reductants, the highest content of Fe in the roasted product is produced by using activated carbon as reductant, followed by coke, anthracite and lignite, the content of wustite in the roasted products is gradually decreased. Among these solid reductants, lignite has the best effect of direct reduction and synchronous dephosphorization, while anthracite and coke take the second place, and activated carbon has the worst effect.
Key words: high-phosphorus oolitic hematite; direct reduction; synchronous dephosphorization; reductant; fixed carbon; volatile
